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MaRussiya [10]
3 years ago
8

If the sum of a number and four is multiplied by two, the result is 28. What is the number?

Mathematics
2 answers:
Marta_Voda [28]3 years ago
7 0

Answer:

10

Step-by-step explanation:

The sum of a number and 4 is multiplied by 2, and the result is 28. In other words, letting the unknown number be x:

2(x+4)=28

Solve for x. Divide both sides by 2:

x+4=14

Subtract 4 from both sides:

x=10

So, our unknown number is 10.

And we're done!

JulijaS [17]3 years ago
4 0

Answer:

10

Step-by-step explanation:

Let the required number be x

2(x+4) =28

x + 4 = 28/2

x + 4 = 14

x = 14 - 4

x = 10

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Eliza is two years younger than half her brother, Juan’s age. Write an equation to represent Eliza’s age. If Juan is 6 how old i
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X = Juan's age
y = Eliza's age

Some key words/phrases we can use to help us make the equation are:

-is (whatever comes after this word usually equals the end result, or what it equals)
-two years younger
-than
-half her brother's age
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just break it down :)

x/2 (half her brother's age) - 2 (two years younger) = y (Eliza is...)

| basically,
v

x/2 - 2 = y
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6/2 - 2 = y

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